Historically, snakes have gotten a bad rap, but there’s a lot to love about these fascinating creatures, writes Jonathan ...

1. Two-headed snakes, scientifically known as bicephalic or polycephalic snakes, are a rare phenomenon in the animal kingdom. 2. They are formed when an embryo splits in two parts but doesn't separate ...

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Where they lived: Dinosaur fossils have been found on every continent, including Antarctica. What they ate: Some ate plants, while others ate animals, including other dinosaurs. How big they were ...

How big they are: From 5 to 32 feet (1.5 to 10 meters) long, depending on the species Dolphins live in almost every ocean, except most tend to avoid the cold waters in the Arctic and around ...

Animals are disappearing at hundreds of times the normal rate, primarily because of shrinking habitats. Their biggest threat: humans. No trace of the wild South China tiger, Panthera tigris ...